package com.itheima.exerciseTest.test01_09;

public class Test3 {
    public static void main(String[] args) {
        String toLowerCase = "ABC".toLowerCase();
        System.out.println(toLowerCase);
        String toUpperCase = "abc".toUpperCase();
        System.out.println(toUpperCase);
        String trim = "  asdasd  ".trim();
        System.out.println(trim);
    }
}
